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# Questions

1
4
votes
1
answer
319
views

### How many distinct eigenvalues does a random graph have?

apr 22 at 14:49 Terry Tao 27.8k4107178

4
votes
2
answers
180
views

### Is there an infinite number of combinatorial designs with $r=\lambda^{2}$

dec 27 at 22:16 Yuichiro Fujiwara 1,3041414

3
votes
1
answer
87
views

### When are cones of matrices “generated” by vectors?

dec 19 at 12:16 Denis Serre 18.7k13193

3
votes
2
answers
181
views

### Graphs with a unique transmission value

nov 28 at 3:04 gordon-royle 2,677920

2
3
votes
3
answers
480
views

### upper bounds on a certain matrix norm

may 21 12 at 23:20 Robert Israel 10.8k822

1
3
votes
1
answer
162
views

### Degree conditions for k-factor

apr 4 12 at 17:53 Gjergji Zaimi 37.5k272149

3
votes
2
answers
181
views

### Hadamard product and inertia

sep 4 at 10:56 Michael 311

3
votes
2
answers
414
views

### matrices whose entries sum to zero

dec 9 at 2:00 RLC 1

2
votes
1
answer
267
views

### S-matrix conjecture: status?

aug 28 at 14:39 Felix Goldberg 2,383412

2
votes
2
answers
230
views

### Generalizations of Oppenheim’s inequality

feb 5 at 22:19 quid 13.1k3151